Metal-sharpening machine



H. J. GAISMAN ET AL METAL SHARPENING MACHINE Filed Aug. 14, 1925 4Sheets-Sheet 1 Jan. 15, 1929. 1,699,510

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H. J. GAISMAN AL.

METAL SHAR PENING MACHINE Filed Aug. 14, 1925- 4 Sheets-Sheet 2 Wdness AT Jan. 15, 1929. 1,699,510

. H. J. GAISMAN ET AL METAL SHARPENING MACHINE Filed Aug. 14, 1925 4Shets-'-Sheet 3 0 un/ M ME Jan, 15, 1929. 1,699,510

H. J. GAISMAN ET AL vMETAL SHARPENING MACHINE Filed Aug" 14, 1925 4Shepts-Sheet 4 21 7 Z8 22 i h 4a WEI/less d f' y glitmvwa Patented Jan.15, 1929.

onirno sra'rrs PATENT OFFICE.

HENRY J. GAISMAN, OF NEW YORK, AND CONRAD SCHUMAGI-JER, F LYITNBROOK,

NEVJ' YORK, ASSIGNORS TO AUTOSTBOP PATENTS GOREOBIATION, OF DOVER, DEL-AWARE, A CORPORATION OF DELAWARE.

METAL-SHARPENING MACHINE.

Application filedAugust 14, 1925. Serial 1110. 50,227.

This invention relates to improvements in machines for sharpening andhoning metal, such as strips of metal continuously fed, and theinvention has for its object to provide means for grinding or honing thesides or edges of metal strips or pieces as fed. The invention isparticularly adapted for producing a sharp edge upon a metal stripadapted to be cut into desired lengths for use as razor blades, and forther purposes.

In carrying out the invention we provide a pair of opposing rotativedisks between which the strip of metal is to be fed, which disks areprovided with correspondingly arranged spaced abrading surfaces locatedupon spaced projections on corresponding faces of the disks betweenintervening spaces therein, so arranged that a projection of one diskwill enter a space of the other disk, and vice versa, the axes of thedisks being located at an oblique angle, whereby the abrading surfacesalong one edgeportion of each. disk will engage the strip duringrotation of the disks.

The invention also comprises noveldetails of improvement that will bemore fully hereinafter set forth andthen pointed out in the cl aims.

Reference is to be had to the accompanying drawin forming a part hereof,wherein Fi 1 is a front elevation of a. machine cms bodying ourinvention;

Fig. 2 is a plan view; Fi 3 is a rear elevation oarts bein omitb 7 b tedFi l is a section on line ll, 4, in Fig. 3; Fig. is a sectionsubstantially on the plane In the accompanying drawings the numeral 1indicates a suitable frame shown provided with a table or top 2. At 3are bearing n'iembers shown bifurcated at their upper ends, andadjustably supported at opposite sides of the frame, adapted torotatively support the grinding or honing disks 4: between which thestrip of metal 5 to be sharpened travels. The frame carries bolts orpivots 6 in eyes 7 on the frame, (Fig. 4), which bolts are keyed tostuds 8 that pass through holes in the bases of the bearing members3'and are secured by nuts 9, nuts 10 on the bolts 6 securing the latterin set position. The arrangement is such that the bearing members 3 maybe adjusted toward and from each other and angularly to regulate theopposing and angular positions of the disks respecting one another. Thedisks l are secured to shafts 11 respectively carried by a bearingmember Shaft 11 is slidably supported in a bushing or hollow shaft 12journaled in the bearing member 3 and retained from endwise movement byheads or disks 13 and 14 shown secured by screws to the said member,(Fig.

Shaftll is slidably adjustable in bushing 12 and provided with a key-way15 receiving a key 16 secured by a screw to the lmshing. whereby thelatter will rotate the shaft. A pulley 17 is secured to the bushing 12for rotating the latter and the shaft 11. A gear 18 is shown secured tothe pulley by screws. The shaft 11, bushing 12 and correlated parts arethe same for each disk 4. Each shaft 11 is longitudinally adjustable inorder that the two opposin disks a may be adjusted toward and from eachother to regu late engagement of the disks with the strip 5 on theopposite sides thereof. A nut or finger-piece 19 is mounted upon anextension 14-3 of head 14 and connected thereto by threads at 20. Theshaft 11 at the outer end is provided with a head 11 located within arecess 19 in nut 19 and bearing against the latter, and a compressionspring 21 is interposed betwecn said shaft and a cap or disk 22 securedby screws on the outer end of nut 19 over recess 19 (Fig. 5). When nut19 is screwed toward the bushing 12 the shaft ll 46 will be driven inunison with'the rotation of disks a for feeding strip 5 in accordancewith the rotation of said disks. 7

When the strip 5 is fed and the disks 4; rotate in unison, inthe'direction of the respective arrows in Fig. 7 the outer portions ofthe projections P will first engage corresponding edge portions of thestrip, and during such engagement of said projections with the stripduring their progression therealong the abrading or grinding surfaces ofthe disks will not only operate upon the strip in a more or lesstransverse direction but also in. a longitudinal direction as thearcuate projections change their angular relation to the edges of thestrip, with what may be termed a wiping or sweeping action. According tothe relation of the projections 4 shown the wide outer portions of theprojections first engage the strip 5 and as the disks rotates the narrowportions of the projections are presented gradually to the strip edgeuntil the extreme inner portions of the projections pass from the strip,and while the latter action is occurring respecting one projection theWide portion of another projection is in engagement with the strip, andso on successively for the several projections as the disks rotate, sothat all portions of the edges of the strip will be engaged by theprojections and the strip Will be supported at all times by a projectionon one side immediately adjacent the place of sharpening of its oppositeside by a projection on the other disk. Due to the angular relation ofthe disks to one another the rear portions only of the disks will engagethe strip in what may be called a V-like relation, and in conjunctionwith the convex inner faces of the disks the projections will sweepalong the strip edges in such a Way as to produce ground or honed edgeson the opposite sides of the strip having the desired bevel or angularrelation along the longitudinal edge of the strip. The machine may beequipped with a single pair of the disks adapted either for grinding orhoning, and the machine may have several sets of disks suitably spacedalong the strip for grinding successively, or for grinding and honingsuccessively, or for honing successively, according to the character ofthe finished edge desired on the strip.

The invention enables rapid and economical grinding and honing of metalstrips as they travel in suitable lengths through the machine in acontinuous manner, as from a reel of the strip suitably mounted. Theground or honed strip may be Wound on a take-up reel, in a Well knownway, or may be cut off into suitable lengths as delivered from thedisks, as for razor blades or for other purposes. Blades or metai piecespreviously cut to the desired length may be fed through the machine tobe ground or honed.

If it is desired to sharpen, (grind or hone),

parting from the spirit of the invention.

but one side of the strip one of the disks 4 may be omitted. H r VTheinvention is not limited to the details of construction andarrangement of parts set forth, as'the same may be varied, within thescope of the appended claims, without de- We use the term sharpen andsharpening to include grinning or honing or both.

Having'now described our invention, what we claim is 1. A sharpeningmachine comprising means to guide a strip, means to feed the strip,sharpening disks located on opposite sides of the strip, said diskshaving convex faces and having spaces and curved sharpening projectionsbetween said spaces, shafts rotatively supporting said disks at anglesto one another with the disks tilted respecting the strip, means torotate said shafts and disks in the same direction and at the same speedwith projections of one disk in spaces of the opposing disk and inengagement with the strip, said projections and spaces being inclined toradii which intersect them so that the strip is supported at all timeson one side by a pro jection on one disk immediately adjacent the placeof sharpening of its opposite side by a projection on the other disk.

2. A sharpening machine comprising coacting sharpening disks, each ofwhich disks has curved spaces and projections intermeshing in spacedrelation and inclined from one end to another respecting intersectingradii, and means for mounting the disks at angles to their verticalandhorizontal axes and at an angle to and in engagement with a strip tobe sharpened so that the strip will be supported at all times by aprojection on one side immediately adjacent the place of sharpening ofits opposite side by a projection on the other disk.

3. In a sharpening machine, a pair of opposing disks providcd withspaced inwardly disposed curved spaces and projections, the face of eachdisk being convex, means rotatably mounting the disks at angles to eachother with their projections intermeshing adjacent to one edge, andmeans to support and propel a strip to be sharpened between and inengagement with the intermeshing portions of the projections, saidprojections and spaces being inclined to radii which intersect them sothat the strip is supported at all times on a side by a projection onone disk immediately adjacent the place of sharpening of its oppositeside by a projection on the other disk.

4:. A sharpening machine comprising means to guide a strip, means tofeed the strip, sharpening disks located on opposite sides of the strip,said disks having spaces in one side face and curved sharpening projections between said spaces which respectiveothex? di'sk; shaftsrotaitii'ely filpl'joxfltifig diks at m1 oblique to (She :inother withthe disks tilted r'sp'citin; the strip, iheiins direction and lhzihs tocause said disks to mate at the sime speed.

Signed at New York city; county and Sta-9 01" New York this 11th day ofAugust, 1925.

HENRY J. GAISMAN. CONRAD SCHUMACHER.

